EP0615056B1 - Ventilstössel mit Rolle - Google Patents

Ventilstössel mit Rolle Download PDF

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Publication number
EP0615056B1
EP0615056B1 EP94200385A EP94200385A EP0615056B1 EP 0615056 B1 EP0615056 B1 EP 0615056B1 EP 94200385 A EP94200385 A EP 94200385A EP 94200385 A EP94200385 A EP 94200385A EP 0615056 B1 EP0615056 B1 EP 0615056B1
Authority
EP
European Patent Office
Prior art keywords
roller
bearing shaft
valve lifter
recess
skirt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94200385A
Other languages
English (en)
French (fr)
Other versions
EP0615056A1 (de
Inventor
Charles Michael Philo
Mark Edmond Kaminski
Philip Edward Lenhart
Donald Eugene Wilcox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motors Liquidation Co
Original Assignee
Motors Liquidation Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of EP0615056A1 publication Critical patent/EP0615056A1/de
Application granted granted Critical
Publication of EP0615056B1 publication Critical patent/EP0615056B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers
    • F01L2305/02—Mounting of rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • This invention relates to roller valve lifters for internal combustion engines.
  • roller valve lifters particularly those used in diesel engines in highway trucks, to use a bronze shaft to journal the roller cam follower.
  • the shaft is ordinarily pressed or staked into opposite openings of a transverse bore extending laterally through the roller end of the lifter to maintain the roller in a recess or pocket formed in and opening through the end of the lifter body.
  • the recess is surrounded by a cylindrical portion of the body forming, in effect, a skirt for bearing against a bore of an associated lifter gallery.
  • US-A-4708102 discloses a lifter in accordance with the preamble of claim 1.
  • DE-A-2941495 discloses a lifter in which the bearing shaft is retained by deformed tongs on the side walls of the body.
  • a roller valve lifter in accordance with the present invention is characterised over US-A-4708102 by the features specified in the characterising portion of Claim 1.
  • the present invention provides mounting and retention means for a roller and bearing shaft in a skirt pocket or recess which permits the use of a larger diameter bearing shaft providing increased bearing surface for improved wear life.
  • the bearing shaft is preferably of known deformable bronze bearing material although other materials, such as steel, ceramics and the like, might be used if found suitable.
  • the bearing shaft with the roller assembled thereon is installed in the preformed recess from the open end of the skirt and is retained in place by staking in discontinuities or openings in the skirt adjacent to the shaft ends.
  • roller valve lifter 10 generally indicates, for example, a roller valve lifter of the hydraulic type, although the invention may equally well be applied to mechanical or solid (non-lash adjusting) type roller valve lifters.
  • Roller valve lifter 10 is reciprocally disposed in a bore 11 of an engine lifter gallery 12 of an engine block.
  • the roller valve lifter 10 is reciprocated by a cam, not shown, to actuate valve mechanism, not shown, through a conventional push rod, not shown.
  • the roller valve lifter 10 comprises a hydraulic lash adjusting valve lifter of known type having an elongated generally cylindrical body 14 with an upper end 15 and a lower end 16.
  • the body 14 includes an exterior annular oil groove 18 which receives oil from an oil gallery 19 connected to the pressure side of an engine oil lubricating system (not shown) and communicating with the lifter gallery bore 11.
  • An oil inlet passage 20 extends through the wall of the body 14 into an enlarged portion of a central cylinder 22 open through the upper end 15 of the body 14.
  • a hollow plunger 23 is reciprocally mounted and defines an internal reservoir chamber 24 into which oil is delivered from the enlarged portion of the central cylinder 22 through a port 26 in the plunger wall near its upper end (which is open).
  • a push rod seat 27 is mounted on the open upper end of the plunger 23 through which oil flow to the valve mechanism is controlled by a metering valve 28 in the form of a captured disk 30 engageable with an orifice on a lower end of the push rod seat 27.
  • An orifice in a lower wall 31 of the plunger 23 separates the reservoir chamber 24 from a high pressure chamber 32 defined by the plunger and a bottom wall 34 of the body 14.
  • a plunger spring 35 urges the plunger 23 upward to take up valve lash in known manner, travel being limited by a wire retainer 36 in the upper end 15 of the body 14.
  • a conventional caged ball check 38 allows oil flow through the orifice in the lower wall 31 from the reservoir chamber 24 to the high pressure chamber 32 but prevents its return to provide a hydraulic column for actuating the associated valve mechanism.
  • the body 14 forms a skirt 39 having a cylindrical outer surface 40 engageable with the bore 11 of the lifter gallery 12.
  • a roller pocket or recess 42 in which there is received a roller 43 which acts as a cam follower.
  • the roller 43 has a generally cylindrical or slightly barrel shaped round outer surface 44 and a coaxial bore 46 extending on an axis 47 transverse to the direction of the reciprocating motion of the body 14.
  • the roller outer diameter is about 3/4 of the outer diameter of the skirt 39.
  • a bearing shaft 48 (which is preferably of bronze) extends through the bore 46 of the roller 43 and journals the roller 43 on a central bearing journal 50 having an outer diameter slightly greater than half the outer diameter of the skirt 39. Opposite ends of the bearing shaft 48 extend beyond the roller 43 and form tangs 51 having axial outer ends 52 and laterally opposite flats 54. The ends 52 are received in transverse extensions 55 of the roller recess 42 which extend within the wall of the skirt 39 and include laterally opposed abutments 56 which closely oppose the flats 54 and centrally position the roller 43 and bearing shaft 48 assembly within the recess 42.
  • the tangs 51 extend longitudinally of the body 14 with the full diameter of the adjacent journal 50 while the flats 54 are formed by machining the lateral sides of the journal extensions to form the tangs 51.
  • the longitudinal extent of the tangs could also be reduced as long as a sufficient length of the flats remains to properly locate and support the roller/bearing shaft assembly.
  • the recess 42 is contained completely within the skirt outer diameter, leaving sufficient wall thickness to provide the desired stiffness.
  • the recess 42 is thus shaped with a generally rectangular configuration opening through the lower end 16 of the body 14. This shape is modified by the transverse extensions 55 centrally from either side to receive and locate the tangs 51 of the bearing shaft 48.
  • the shape of the recess 42 is such as to permit installation of the roller 43 together with and after assembly on the shaft journal 50 through the lower end 16 of the body 14, thereby allowing the use of a substantially larger shaft journal diameter than is possible when the bearing shaft is installed through transverse holes in the skirt as is conventional.
  • the ratios of the shaft journal 50 diameter to that of the skirt outer wall and the roller outer surface are about 0.54 and 0.71, respectively. Comparatively, the diameter ratio of the roller 43 to the skirt 39 is about 0.76.
  • a reasonable range of shaft journal/skirt ratios greater than 0.5 is possible with the present invention, depending in part upon the selected roller outer diameter and the strength of the materials chosen from those that may be suitable for the operating conditions. In the present instance a shaft journal/skirt ratio range from 0.50 to 0.65 appears practical with the other ratios being adjusted accordingly.
  • the preferred practice capable of use with selection of a deformable shaft material such as bronze, is to stake or deform a portion of the tangs 51 into recesses or openings in the skirt 39 adjacent the tangs.
  • these recesses are formed by cross drilled and counter bored or chamfered holes 58 through the skirt 39 opposite the outer ends 52 of the tangs 51.
  • the holes 58 form curved recesses 59 into which adjacent portions of the tangs 51 are staked by deforming the ends of the tangs with a staking tool.
  • laterally elongated through slots 60 are provided which extend inward opposite portions of the flats 54 near the ends 52 of the tangs 51. Adjacent portions of the tangs 51 are staked into the slots 60 to retain the bearing shaft 48 in a fixed position. Obviously other forms of openings through the skirt 39 or recesses within the skirt may be provided if desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Claims (10)

  1. Rollenartiger Ventilstößel (10) mit einem zylindrischen Körper (14) mit einer Achse, gegenüberliegenden ersten (16) und zweiten (15) Enden, und einer Aussparung (42), die eine Zentralöffnung durch das erste Ende hindurch aufweist und innerhalb einer umschließenden Einfassung (39) mit einer zylindrischen äußeren Fläche (40) enthalten ist; einer Rolle (43), die als ein Nockenstößel wirkt, die in der Aussparung aufgenommen ist, wobei die Rolle eine runde äußere Fläche (44) und eine Bohrung (46) besitzt, die auf einer Achse quer zu der Achse des zylindrischen Körpers zentriert ist; einer Lagerwelle (48) mit einem zylindrischen Drehlager (50), die sich durch die Bohrung erstreckt, und die Rolle für eine Drehung darauf drehbar lagert, wobei die Lagerwelle gegenüberliegende Enden (51, 52) besitzt, die sich axial über die Rolle hinaus in die Aussparung entlang der Achse der Rolle erstrecken, um die Lagerwelle in der Aussparung zu lokalisieren, wobei die Rolle zentriert ist und sich in Längsrichtung teilweise über das erste Ende des zylindrischen Körpers hinaus erstreckt; und einem Haltemittel zum Halten der Lagerwelle in der Aussparung, wobei das Haltemittel Abschnitte (51, 52) der Lagerwelle umfaßt, die in Unregelmäßigkeiten (58, 60) der Einfassung eingestemmt sind;
    dadurch gekennzeichnet,
    daß die Zentralöffnung der Aussparung (42) derart ausgebildet ist, daß die Anbringung der Lagerwelle (48), auf der die Rolle (43) montiert ist, durch das erste Ende (16) des Körpers (14) zu möglich ist.
  2. Rollenartiger Ventilstößel nach Anspruch 1, worin die Unregelmäßigkeiten Öffnungen (58, 60) durch die Einfassung (39) benachbart zu den äußeren Enden (52) der Lagerwelle (48) umfassen.
  3. Rollenartiger Ventilstößel nach Anspruch 2, worin die Durchgangsöffnungen runde (58) oder längliche Schlitze (60) sind.
  4. Rollenartiger Ventilstößel nach einem der Ansprüche 1 bis 3, worin die gegenüberliegenden Enden der Lagerwelle (48) jeweils einen integralen Vorsprung (51) mit einem äußeren Ende (52) und seitlich gegenüberliegenden abgeflachten Seiten (54) festlegen, wobei die Vorsprünge innerhalb der Verlängerungen (55) der Aussparung (52) eng eingepaßt sind, die seitliche Anschlagflächen (56) aufweisen, die den abgeflachten Seiten der Vorsprünge gegenüberliegen, um die Lagerwelle in der Aussparung zu lokalisieren; und worin das Haltemittel die Lagerwelle in den Verlängerungen hält.
  5. Rollenartiger Ventilstößel nach Anspruch 4, worin die Lagerwelle (48) aus einem verformbaren Material ausgebildet ist, wobei die äußeren Enden (52) Abschnitte besitzen, welche nach der Anbringung in dem zylindrischen Körper (14) in Eingriff mit den Kanten der Unregelmäßigkeiten (58, 60) verformt sind, um die Lagerwelle und die Rolle (53) an ihren angebrachten Positionen in den Verlängerungen (55) zu halten.
  6. Rollenartiger Ventilstößel nach Anspruch 5, worin die Lagerwelle (39) aus Bronze gefertigt ist.
  7. Rollenartiger Ventilstößel nach einem der Ansprüche 1 bis 6, worin der rollenartige Ventilstößel einen hydraulischen Ventilstößel umfaßt.
  8. Rollenartiger Ventilstößel nach einem der Ansprüche 1 bis 7, worin das diametrale Verhältnis des zylindrischen Drehlagers (50) zu der zylindrischen äußeren Fläche (40) der Einfassung (39) nicht weniger als 0,5 beträgt.
  9. Rollenartiger Ventilstößel nach einem der Ansprüche 1 bis 8, worin das diametrale Verhältnis des zylindrischen Drehlagers (50) zu der runden äußeren Fläche (44) der Rolle (43) nicht weniger als 0,6 beträgt.
  10. Rollenartiger Ventilstößel nach einem der Ansprüche 1 bis 9, worin das diametrale Verhältnis des zylindrischen Drehlagers (50) zu der zylindrischen äußeren Fläche (40) der Einfassung (39) im Bereich von 0,5 bis 0,6 liegt.
EP94200385A 1993-03-11 1994-02-14 Ventilstössel mit Rolle Expired - Lifetime EP0615056B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/029,793 US5273005A (en) 1993-03-11 1993-03-11 Enlarged shaft roller lifter with retention means
US29793 1993-03-11

Publications (2)

Publication Number Publication Date
EP0615056A1 EP0615056A1 (de) 1994-09-14
EP0615056B1 true EP0615056B1 (de) 1997-05-28

Family

ID=21850908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94200385A Expired - Lifetime EP0615056B1 (de) 1993-03-11 1994-02-14 Ventilstössel mit Rolle

Country Status (4)

Country Link
US (1) US5273005A (de)
EP (1) EP0615056B1 (de)
JP (1) JPH06317111A (de)
DE (1) DE69403366T2 (de)

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US5385124A (en) * 1994-05-31 1995-01-31 Eaton Corporation Roller follower axle
US5673661A (en) * 1995-11-27 1997-10-07 Jesel; Daniel Henry Valve lifter
US5678514A (en) * 1996-04-02 1997-10-21 Ford Global Technologies, Inc. Valve lifter retainer for an internal combustion engine
DE19631653A1 (de) * 1996-08-05 1998-02-12 Hatz Motoren Kipphebel für eine Brennkraftmaschine
US5931133A (en) * 1998-05-18 1999-08-03 General Motors Corporation Roller cam follower bearing shaft retention
US6289765B1 (en) 1999-09-20 2001-09-18 Delphi Technologies, Inc. Roller follower shaft retention
US6302075B1 (en) * 2000-01-07 2001-10-16 Delphi Technologies, Inc. Roller finger follower shaft retention apparatus
DE10054506A1 (de) * 2000-11-03 2002-05-16 Ina Schaeffler Kg Vorrichtung zur Steuerung des Gaswechsels von Viertakt-Ottomotoren mit variabel steuerbaren Einlaßventilen
US20060005797A1 (en) * 2004-07-08 2006-01-12 Schubeck Joseph J Roller valve lifter
DE102006045933A1 (de) * 2006-09-28 2008-04-03 Robert Bosch Gmbh Stößelbaugruppe für eine Hochdruckpumpe und Hochdruckpumpe mit wenigstens einer Stößelbaugruppe
JP2010037997A (ja) * 2008-08-01 2010-02-18 Denso Corp 燃料供給ポンプ
DE102010033120A1 (de) * 2010-08-03 2012-02-09 Schaeffler Technologies Gmbh & Co. Kg Nockenfolger
US8915224B2 (en) * 2010-12-18 2014-12-23 Caterpillar Inc. Rocker shaft shim
EP2607636B1 (de) * 2011-12-23 2015-10-14 Aktiebolaget SKF Mechanisches System, Einspritzpumpe mit solch einem mechanischen System und Verfahren zur Herstellung solch eines mechanischen Systems
JP5992540B2 (ja) * 2012-02-08 2016-09-14 コーヨー ベアリングス ノース アメリカ エルエルシー フォロワー機構
DE102012202566B4 (de) 2012-02-20 2021-12-23 Schaeffler Technologies AG & Co. KG Rollenstößel mit fingerartigem Bolzenhalterungsmittel
DE102012202568B4 (de) * 2012-02-20 2021-12-23 Schaeffler Technologies AG & Co. KG Rollenstößel mit Halterungen für einen gestuften Bolzen
DE102012208791A1 (de) * 2012-05-25 2013-11-28 Schaeffler Technologies AG & Co. KG Stößel
DE102012210176A1 (de) 2012-06-18 2013-12-19 Schaeffler Technologies AG & Co. KG Stößel
FR3010167B1 (fr) * 2013-08-27 2015-10-02 Skf Ab Element de transmission
ITTO20130744A1 (it) 2013-09-13 2015-03-14 Skf Ab Cannotto costampabile con vasche di lavatrici
US9309787B2 (en) 2014-06-30 2016-04-12 Electro-Motive Diesel, Inc. Engine rocker arm and roller assembly
EP3002424A1 (de) * 2014-09-30 2016-04-06 Aktiebolaget SKF Mechanisches System zur Bildung eines Nockenfolgers oder eines Kipphebels
DE102014223597B4 (de) * 2014-10-08 2019-02-07 Continental Automotive Gmbh Rolle für einen Rollenstößel einer Kraftstoffhochdruckpumpe, Rollenstößel, Kraftstoffhochdruckpumpe und Brennkraftmaschine
EP3026232B1 (de) * 2014-11-27 2020-01-08 Aktiebolaget SKF Mechanisches System zur Formung eines Kurvenrollers oder eines Kipphebels, Einspritzpumpe oder Ventilstellglied mit solch einem mechanischen System und Verfahren zur Herstellung solch eines mechanischen Systems
EP3054116B1 (de) * 2015-02-05 2018-12-26 Aktiebolaget SKF Nockenfolger und Verfahren zur Herstellung eines solchen Nockenfolgers
JP6799352B2 (ja) * 2015-06-11 2020-12-16 イートン コーポレーションＥａｔｏｎ Ｃｏｒｐｏｒａｔｉｏｎ ロッカーアーム及びロッカーアームの製造法、並びに、バルブ開閉力伝達具及びバルブ開閉力伝達具の製造方法
US10502303B2 (en) * 2018-04-30 2019-12-10 Gm Global Technology Operations, Llc Cam follower and guide assembly

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Also Published As

Publication number Publication date
JPH06317111A (ja) 1994-11-15
EP0615056A1 (de) 1994-09-14
DE69403366D1 (de) 1997-07-03
DE69403366T2 (de) 1997-09-18
US5273005A (en) 1993-12-28

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